My Math Problem
When wrapping a birthday gift for his mother, Kenji adds an additional 2.5 square feet of gift wrap to allow for overlap. How many square feet of gift wrap will Kenji use to wrap a gift 3.5 feet long, 18 inches wide, and 2 feet high?
My answer is 30.5 square feet
2(3.5 * 1.5) = 10.5
2(1.5 * 2) = 6
2(2 * 3.5) = 14
Your answer is right, but you forgot the overlap.
30.5 + 2.5 = 33 square feet
Ohh 18 inches = 2.5 ft
Ms.Sue where did u get 1.5?
Did she mean 2.5
Where did you get the 1.5
I dont understand which one
Apparently my teacher got the answer of 214.5ft^2 and I'm so confused
33 sq feet is correct
To calculate the square footage of gift wrap used by Kenji, we need to find the total surface area of the gift.
First, let's convert all the measurements to the same unit. We know the gift is 3.5 feet long, 18 inches wide, and 2 feet high.
Since 1 foot is equal to 12 inches, the width is 18/12 = 1.5 feet.
Now, we can calculate the surface area of the gift. To find the surface area, we need to consider all six sides of the rectangular prism.
1. The top and bottom sides have the same dimensions: 3.5 feet long by 1.5 feet wide.
So, the area of the top and bottom sides is 3.5 ft * 1.5 ft = 5.25 square feet each.
2. The front and back sides have the dimensions: 3.5 feet long by 2 feet high.
Hence, the area of the front and back sides is 3.5 ft * 2 ft = 7 square feet each.
3. The left and right sides have the dimensions: 1.5 feet wide by 2 feet high.
Therefore, the area of the left and right sides is 1.5 ft * 2 ft = 3 square feet each.
Now, let's sum up all the areas:
Top and bottom sides: 5.25 ft² each
Front and back sides: 7 ft² each
Left and right sides: 3 ft² each
Total surface area = 2(5.25 ft²) + 2(7 ft²) + 2(3 ft²)
= 10.5 ft² + 14 ft² + 6 ft²
= 30.5 ft²
You are correct! Kenji will use 30.5 square feet of gift wrap to wrap the gift, including the additional 2.5 square feet for overlap.